syzkaller login: [ 31.801884] BUG: Bad rss-counter state mm:000000000796fe95 type:MM_FILEPAGES val:33 [ 31.803235] BUG: Bad rss-counter state mm:000000000796fe95 type:MM_ANONPAGES val:22 [ 31.917092] ================================================================== [ 31.918011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.919076] Read of size 8 at addr ffff88800dcf3df0 by task sshd/220 [ 31.919877] [ 31.920116] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.921011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.922017] Call Trace: [ 31.922346] [ 31.922636] dump_stack_lvl+0x91/0xf0 [ 31.923153] print_report+0xcc/0x620 [ 31.923675] ? __virt_addr_valid+0x102/0x340 [ 31.924252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.924877] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.925521] kasan_report+0xbe/0xf0 [ 31.925999] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.926635] vma_interval_tree_remove+0xc75/0xec0 [ 31.927272] vma_prepare+0xc54/0x11a0 [ 31.927775] __split_vma+0x5af/0x950 [ 31.928269] ? __pfx___split_vma+0x10/0x10 [ 31.928800] ? find_held_lock+0x2c/0x110 [ 31.929343] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.929917] ? lock_is_held_type+0x9f/0x120 [ 31.930469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.931111] ? mtree_range_walk+0x632/0x900 [ 31.931703] ? mas_walk+0x5c7/0x7c0 [ 31.932220] do_vmi_munmap+0x1f1/0x2b0 [ 31.932713] mmap_region+0x1f9/0x2660 [ 31.933264] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.933836] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.934572] ? __pfx_lock_acquire+0x10/0x10 [ 31.935126] ? __pfx_mmap_region+0x10/0x10 [ 31.935679] ? security_mmap_addr+0x7d/0xa0 [ 31.936249] ? get_unmapped_area+0x1f5/0x3f0 [ 31.936803] do_mmap+0x854/0xf00 [ 31.937259] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.937756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.938342] ksys_mmap_pgoff+0x3af/0x500 [ 31.938855] do_syscall_64+0x3f/0x90 [ 31.939347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.940022] RIP: 0033:0x7f6e519bbd82 [ 31.940501] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.942652] RSP: 002b:00007ffd85a4eb38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.943579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e519bbd82 [ 31.944456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e50df5000 [ 31.945314] RBP: 00007f6e50df5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.946173] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623653bbf70 [ 31.947020] R13: 00007ffd85a4eb50 R14: 00007ffd85a4eb80 R15: 00007ffd85a4eee0 [ 31.947904] [ 31.948232] [ 31.948450] Allocated by task 213: [ 31.948885] kasan_save_stack+0x22/0x50 [ 31.949411] kasan_set_track+0x25/0x30 [ 31.949908] __kasan_slab_alloc+0x59/0x70 [ 31.950451] kmem_cache_alloc+0x16b/0x370 [ 31.950965] vm_area_dup+0x20/0x160 [ 31.951437] __split_vma+0x170/0x950 [ 31.951911] split_vma+0xc6/0x110 [ 31.952379] mprotect_fixup+0x8d2/0xb30 [ 31.952883] do_mprotect_pkey+0x87e/0xd40 [ 31.953427] __x64_sys_mprotect+0x78/0xc0 [ 31.953948] do_syscall_64+0x3f/0x90 [ 31.954430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.955094] [ 31.955308] Freed by task 213: [ 31.955715] kasan_save_stack+0x22/0x50 [ 31.956250] kasan_set_track+0x25/0x30 [ 31.956747] kasan_save_free_info+0x2b/0x50 [ 31.957299] __kasan_slab_free+0x10a/0x190 [ 31.957832] kmem_cache_free+0x10d/0x4d0 [ 31.958361] rcu_core+0x8c8/0x2860 [ 31.958808] __do_softirq+0x1b7/0x7d4 [ 31.959295] [ 31.959532] Last potentially related work creation: [ 31.960151] kasan_save_stack+0x22/0x50 [ 31.960657] __kasan_record_aux_stack+0x8e/0xa0 [ 31.961245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.961889] remove_vma+0x139/0x170 [ 31.962360] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.962918] do_vmi_munmap+0x1f1/0x2b0 [ 31.963421] __vm_munmap+0x138/0x3a0 [ 31.963908] __x64_sys_munmap+0x59/0x80 [ 31.964436] do_syscall_64+0x3f/0x90 [ 31.964913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.965568] [ 31.965786] The buggy address belongs to the object at ffff88800dcf3d98 [ 31.965786] which belongs to the cache vm_area_struct of size 168 [ 31.967294] The buggy address is located 88 bytes inside of [ 31.967294] freed 168-byte region [ffff88800dcf3d98, ffff88800dcf3e40) [ 31.968733] [ 31.968954] The buggy address belongs to the physical page: [ 31.969624] page:00000000eaf1089d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcf3 [ 31.970723] memcg:ffff88800ef39101 [ 31.971168] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.971837] page_type: 0xffffffff() [ 31.972329] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.973276] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef39101 [ 31.974197] page dumped because: kasan: bad access detected [ 31.974857] [ 31.975088] Memory state around the buggy address: [ 31.975677] ffff88800dcf3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.976567] ffff88800dcf3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.977441] >ffff88800dcf3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.978309] ^ [ 31.979135] ffff88800dcf3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.980032] ffff88800dcf3e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.980900] ================================================================== [ 31.983049] Disabling lock debugging due to kernel taint [ 33.812961] BUG: Bad rss-counter state mm:00000000fd47d4f2 type:MM_FILEPAGES val:33 [ 33.814143] BUG: Bad rss-counter state mm:00000000fd47d4f2 type:MM_ANONPAGES val:22 [ 34.216904] BUG: Bad rss-counter state mm:000000004608f09d type:MM_FILEPAGES val:33 [ 34.217964] BUG: Bad rss-counter state mm:000000004608f09d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59102' (ECDSA) to the list of known hosts. 2023/06/20 04:44:22 fuzzer started 2023/06/20 04:44:22 dialing manager at localhost:44161 2023/06/20 04:44:23 checking machine... 2023/06/20 04:44:23 checking revisions... [ 34.926159] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:44:23 testing simple program... [ 34.979226] cgroup: Unknown subsys name 'net' [ 35.034441] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8114409f RDX=ffffed1002d6c801 RSI=0000000000000008 RDI=ffff888016b64000 RBP=ffff888016b63780 RSP=ffff88801806fd58 R8 =0000000000000001 R9 =ffffed1002d6c800 R10=ffff888016b64007 R11=0000000000000000 R12=ffff888008458940 R13=ffff8880084591c0 R14=0000000000000000 R15=ffff888008458940 RIP=ffffffff811440a8 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8954b39900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f8954a55000 CR3=000000001825e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=25252525252525252525252525252525 XMM01=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8187d110 RBX=ffff88801806ff58 RCX=1ffffffff0ba7a02 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff88801806ff58 RBP=ffff88801806ff48 RSP=ffff88801806ff20 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88801806ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000296 [--S-AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8954b39900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f89550ee650 CR3=000000001825e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000